0
votes
0answers
14 views

MariaDB Galera setup with drastically different amounts of memory used on cluster nodes - why?

We have a 3 node MariaDB Galera cluster. All nodes are identical and the config on each is identical. They have 64GB of RAM each. The output of the following query is 28: SELECT ...
0
votes
1answer
31 views

MySQL - prevent OS cache for query

On high load production server I have many sql selects which are unique or re-use will be in hours. I use SQL_NO_CACHE but this queries are still cached with OS cache. Server have 64G ram and used ram ...
0
votes
1answer
41 views

update variable from multiple tables in one row

I have two databases, and I need to UPDATE variable 'birthday' from one row to another checking 'name' (from db1 to db2). The problem is, that 'name' variable in second db is located in another table ...
0
votes
1answer
23 views

Mysql will not start

Please help, I really need to recover my databases. service mysql start start: Job failed to start mysqld --verbose 140401 20:16:11 [Warning] Can't create test file ...
0
votes
0answers
11 views

MySQL/MariaDB CLI limits max password?

I've got strange problem - my MariaDB instance CLI (Linux) does enforce limit on how long password can be. For example, setting password like this UPDATE mysql.user SET ...
0
votes
0answers
18 views

MariaDB : Larger innodb_buffer_pool_size causing SQL updates to be slower

Has anyone here encountered such scenario before where and update statement took longer time to run when innodb_buffer_pool_size is bigger. I've run a few tests using the same statements on around ...
0
votes
1answer
35 views

make MariaDB Auto-Increment-Increment dynamic

In a certain replication setup I have created multi-master replication in STAR topology using MariaDB. I have an unknown number of 'client-masters', so I have set the auto_increment_increment to 30 ...
1
vote
1answer
36 views

mariadb 5.5.36 with innodb plugin

I installed mariadb 5.5.36 on a win32 system. Everything runs fine except innodb requests are 2 x slower than an identical MySQL installation. So I want to switch back to original innodb plugin to ...
3
votes
1answer
18 views

Is the innodb_lazy_drop_table problem solved?

I'm researching database configuration for MySQL/MariaDB. I've been reading the configuration chapter in "High Performance MySQL". In there, it suggests that innodb_lazy_drop_table can be used to ...
1
vote
1answer
66 views

Why does auto increment jumps by more than the number of rows inserted?

I am very perturbed by this weird behaviour I am seeing in the auto_increment value recorded in the bidID of a Bids table after performing bulk insertion using a stored procedure: INSERT INTO Bids ...
0
votes
2answers
35 views

Is there a way to enable MariaDB MEMORY storage engine for every table?

I am new to MariaDB and interested in using it because I want to use MEMORY storage engine for every table. I read MEMORY storage engine on mariadb.com and it seems like I had to specify storage ...
0
votes
2answers
57 views

How to determine the optimal sort_buffer_size?

I read from a sample configuration file which says the following: # Sort buffer is used to perform sorts for some ORDER BY and GROUP BY # queries. If sorted data does not fit into the sort buffer, a ...
0
votes
1answer
57 views

MariaDB not caching any queries

I tested several simple queries like such: SELECT COUNT(*) FROM Users WHERE courses='a'; But none are being cached. The following are the cache related variables: show variables like "%cache%"; ...
0
votes
1answer
82 views

Configure MariaDB PAM authentication, and enabling remote login from Toad

I am currently trying to integrate Linux services into my Windows environment and have installed MariaDB with PAM authentication following the guidance from MariaDB. I have tested successfully on ...
1
vote
1answer
60 views

MariaDB: Created_tmp_disk_tables high after start

today i looked in the status of my MySQL server which is based on MariaDB and i noticed that Created_tmp_disk_tables is very high (over 168k). I think this is the reason for my high I/O usage. I try ...
1
vote
1answer
20 views

Count/Statistic for number of SHOW INDEX queries in MySQL/MariaDB 5.5

We have a lot of SHOW INDEX FROM queries coming from our ORM layer. Usually there is a mechanism to prevent this but it doesn't seem to work at the moment. To better analyze the problem it would be ...
0
votes
2answers
53 views

Show Users That Connect To DB

We are using Maria DB (v5.3 I believe) in our production environment. One issue that we have, is that historically, the dev user (which has full rights and privileges) is used in all applications ...
0
votes
1answer
41 views

Best Indexing Strategy for Query with Equality[A], Range[B], Group By[C], AND Order By[count(P)]

I have a poorly performing query: SELECT user_id, count(item_id) as count FROM table items WHERE category = 'magazine' AND created_at > 1384754400 GROUP BY user_id ORDER BY count(item_id) desc ...
1
vote
1answer
90 views

MySQL/MariaDB stored procedure inserts even with syntax error

createdAt has not been defined, but the query still runs when I call this proc and inserts a "0" date. Why, shouldn't it fail? DELIMITER $$ USE `MobiFit_Dev` $$ DROP PROCEDURE IF EXISTS ...
0
votes
0answers
253 views

Incorrect definition of table mysql.event after migrating database to mariadb

I did a mysqldump to dump all databases into a .sql file, then installed a mariadb server. There are no errors after the installation. But after restoring the databases, I started to observe the ...
0
votes
1answer
697 views

Fedora cannot start mariadb/mysqld

I've done these commands: $ sudo yum install mysql $ mysql_secure_installation $ sudo service mysqld start $ sudo service mariadb start yum installs fine, but when I try to start the services or do ...
0
votes
3answers
231 views

InnoDB + TokuDB fills up RAM then start swapping

I'm trying to face difficulties with my database lately. I've migrated from MyISAM to TokuDB v7.0.4 and InnoDB. I'm using MariaDB - 5.5.34-MariaDB-1~wheezy-log. My problem is that MariaDB fills up RAM ...
1
vote
0answers
65 views

mysql/mariadb: ifnull changes collation

It seems that 'ifnull' changes the default collation that is set to be used. I have tried on both mysql and mariadb: Server version: 5.5.34-MariaDB-1~precise-log mariadb.org binary distribution ...
1
vote
2answers
157 views

Setting default CHARSET and DB Engine

I recently updated my server's database system from MySQL to MariaDB. After update, everything works well. But, when I went to phpMyAdmin, the default charset and types are changed: At the end of ...
2
votes
3answers
937 views

Purge old records from mysql ibdata1 file

Is it possible to purge old records from an ibdata1 file without taking down the database attached to it? Records that have been deleted from the database are still present when I scan ibdata1 for ...
2
votes
1answer
229 views

What are the drawbacks of using Galera Cluster instead of Master/Slave Replication?

What are the drawbacks of using Galera Cluster instead of regular Master/Slave Replication? Galera's 0 slave lag time, Synchronous replication and no Single point of failure seem very appealing then ...
0
votes
2answers
1k views

node unable to join a galera cluster; it fails during state transfer

It looks like the node is joining the cluster and then it fails… I have tried with both rsync and xtrabackup and it fails during state transfer. I seems to me that I am missing something real simple ...
1
vote
2answers
244 views

Slow query responce on different mysql versions, percona, MariaDB

LEFT JOIN is supposed to be faster than a NOT IN query. This is what I've read online. But practically, this seems to be opposite. I have the following query here, INSERT IGNORE INTO callrequests ...
0
votes
2answers
2k views

MySQL - Autoincrement does not increment sequentally if last row was deleted

I have a table which contains an auto incremented primary key id. If I delete the last row (highest id, for exampe id = 6) and insert a new row, the new id starts at 7. Which paramater I have to ...
1
vote
2answers
51 views

Indexing a reference column

Say I have a reference table like languages with only 20 records. Is it worth indexing a field like language_code (e.g. en, es) that's frequently used in queries? I'm wondering if an efficient server ...
0
votes
1answer
605 views

Why should I use InnoDB and MySql instead of XtraDB and MariaDB? [closed]

Why should I use InnoDB and MySql instead of XtraDB and MariaDB, except that InnoDB and Mysql happen to be installed by default on my servers? Why isn't MariaDB and XtraDB installed by default ...
0
votes
1answer
286 views

Install MariaDB and MySQL in CentOS 6 32bit in same server

I'm trying to install MariaDB with MySQL in the same server but got this errors: Setting up Install Process Resolving Dependencies --> Running transaction check ---> Package MariaDB-client.i686 ...
0
votes
0answers
53 views

Can I have a Distributed Database in which one database is MariaDB and the other one is MySQL Cluster?

This is a hypothetical question of course, I just want to know, because that's one of the question i'm going to be asked in my presentation and I have a feeling that the answer is "yes" after all my ...
2
votes
2answers
329 views

How do I determine how much data is being written per day through insert, update and delete operations?

The longevity of SSDs is largely determined by the amount of bytes written by insert, update and delete operations. What is the best way to accurately determine how much data is being written by ...
1
vote
0answers
266 views

How do I safely import MySQL data in a directory to a running MariaDB server?

We're integrating another office into ours. That includes some of their data. I have a new installed MariaDB 5.5 server. The data dir = /home/data/MariaDB. I've done a new/fresh install into that ...
0
votes
1answer
1k views

Which is faster among MySQL Community Server, Percona and MariaDB [closed]

I have a small setup of MySQL Community Server version 5.6 running on KVM based VPS. 4 CPU cores are available and total memory is limited to 1GB. I use MyISAM tables mainly for Wordpress and few ...
0
votes
1answer
288 views

Is there a system wide way to change MariaDB to create tables using ROW_FORMAT = DYNAMIC

I've got a 700MB dump file from a mysql database that I was trying to undump into a new install of MariaDB and I got this error ERROR 1118 (42000) at line 7481: Row size too large (> 8126). ...
2
votes
0answers
284 views

To what extent is MariaDB Java client a perfect replacement for MySQL JDBC (Connector/J)?

Premise: I ship a Java application which will make a JDBC connection to a MySQL database. (At the time of this writing it could be 5.1 or 5.5, but hopefully the question and answer don't rely heavily ...
0
votes
1answer
220 views

UTF8 vs ASCII or custom binary format: high-performance optimization on very big tables

The summary of my question is whether there are advantages, even if minimal, to use ASCII, or even a smaller format designed yet created specifically for the situation, instead of UTF-8 for strings. ...
3
votes
3answers
130 views

How can I improve this query?

About a year back I introduced a query which returns a sort of "Customers Also Purchased" data-set. At the time it ran reasonably fast however, as of late it's become very slow, sometimes taking up to ...
0
votes
4answers
975 views

Daily and Differential Backups [closed]

Is there a program with which I can create daily MySQL, PostgreSQL and MariaDB backups with these requirements: The first time, make a full backup. The second time, only the changes since the last ...
2
votes
2answers
336 views

MySQL Full Text search increase relevance for exact matches?

I have a MySQL database of ~10,000 organisation names that I want to be able to search. I would like to use a full text search because this would enable me to find "institute of doobry" by searching ...
3
votes
2answers
730 views

SHOW TABLE STATUS very slow on InnoDB

Recently we've been migrating from MyISAM to InnoDB and I understand that MyISAM uses meta information against each table to track information and such - however, the database is about 1.8gb with 1+ ...
0
votes
0answers
56 views

Autoincrement by 2

I use MariaDB 5.5. It increases every auto_increment value by 2. So all my ai cols look like 1 3 5 7 9 ... Where can I change this behaviour? Or might this be a bug?
2
votes
1answer
744 views

MariaDB, Triggers and last_insert_id

I have a situation where I have three tables: sample, sample_name and run (extra columns removed to be only relevant information). CREATE TABLE `sample` ( `sample_id` int unsigned NOT NULL ...
1
vote
2answers
1k views

how to import mysql system “mysql” database [closed]

This question might be already answered but it's almost impossible to google it. When I perform full backup of mysql server using mysqldump --all-databases then reinstall it from scratch I want to ...
0
votes
0answers
272 views

Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)! in Fedora16

I installed MariaDB server in linux using tar file(mariadb-5.5.28a-linux-i686.tar.gz) followed by the instructions from this link : https://kb.askmonty.org/en/installing-mariadb-binary-tarballs/. ...
1
vote
1answer
426 views

MariaDB allowing select only user to create databases

I'm baffled. I have a select only user, but somehow, the user can create a new database, and create table inside the new database. It can't create tables inside other db. It's really odd. This is ...
2
votes
3answers
207 views

mariadb ignoring force index

I'm trying to tune a relatively simple query: select bt.col1,bt.col2 from bigtable bt join smalltable st on bt.smalltable_id = st.smalltable_id where st.name = 'some name occuring only once in st' ...
4
votes
4answers
602 views

TRUNCATE TABLE statement sometimes hangs

Why does the TRUNCATE TABLE statement hang sometimes? What are the reasons for this type of issue? I am migrating from MySQL to MariaDB. This problem doesn't happen with MySQL, only with MariaDB. ...